Iwobi made the move from Arsenal last week.
“It's a matter of us to put him in the best physical condition possible," Silva says.
"Of course we tried to do as fast as possible for him to start with the team. It was a difficult week for him – it's normal. Similar to [Jean-Phillipe] Gbamin the week before because just one week working with the team.
“He's working really hard and well, Alex, like all the others, and it's up to me to decide if he will or not in the squad tomorrow."